- Date
- June 22, 2022, 11:30 local (16:30 UTC)
- Place
- Yoder, KS
- Injuries
- 1 serious, 1 minor
- Damage
- Substantial damage
- Phase of flight
- Approach
- Aircraft
- N364BALet L-23 Super Blanik
- Defining event
- Approach-VFR pattern base: Aerodynamic stall/spin
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- Investigation class
- Class 4 - Basic report with no Prelim publish
- NTSB office
- Central Region
- Parties
- Federal Aviation Administration
- FAA report
- 20220622010899A
- Case key
- 105339
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The pilot's encounter with sinking air conditions that resulted in a loss of lift and a subsequent loss of control.
Findings · 1
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
Analysis
The flight instructor reported that after demonstrating maneuvers he noticed that the glider had quickly descended to pattern altitude, so he proceeded into the traffic pattern. He slowed the glider to minimum sink airspeed and then turned onto the base leg about 200 to 250 ft above ground level. During the base leg turn, the glider continued to turn and descend, and the flight instructor was unable to maintain control. The glider impacted terrain short of the runway and sustained substantial damage to the fuselage, empennage, and both wings. The flight instructor reported that there were no preimpact mechanical malfunctions or failures with the glider that would have precluded normal operation. The flight instructor reported that there was sinking air in the flight area.
Aircraft
- Registration
- N364BA
- Reported as
- Let L-23 Super Blanik
- Category
- Glider
- Serial number
- 008706
- Built
- 2000
- Airframe hours
- 4,420.9
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Operator
- Civil Air Patrol Inc
- Registered owner
- Civil Air Patrol Inc
- Airworthiness certificate
- Standard, Utility; Standard, Normal
- Last inspection
- Annual · May 4, 2022
- Airport
- SN76 · Sunflower Aerodrome Gliderport, runway 17, 7,000 × 200 ft, asphalt
- Equipment
- ADS-B
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 71
- Injuries
- Serious
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- BasicMed, Without waivers/limitations
- Last flight review
- June 22, 2021
- Seat
- Rear
- Restraint
- 5-point
- Flight hours
- 6,143 total · 359 in this make and model · 5,963 as pilot in command · 0 in the last 24 hours
- Role
- Student pilot
- Age
- 15
- Injuries
- Minor
- Seat
- Front
- Restraint
- 5-point
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 90° at 10 knots
- Visibility
- 10 statute miles
- Temperature
- 79 °F, dew point 70 °F
- Altimeter
- 30.21 inHg
- Observed at
- KHUT, 8 nm away
- METAR
- KHUT 221652Z 09010KT 10SM FEW019 26/21 A3021 RMK AO2 SLP207 T02610211
Docket · 2
The files NTSB released with the investigation on July 22, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 7.1 MB in all.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.